A Alcaligenes strain ho-1 and its application

Abstract

The present invention provides an Alcaligenes sp. strain HO‑1 with a preservation number of CGMCC No. 16549, which is isolated from a semi-short-path nitrification reactor for treating pig farm wastewater. The strain has been deposited in the General Microbiology Center of the China Committee for the Collection of Microbial Cultures on September 28, 2018, and the preservation number is CGMCC No.16549. Alcaligenes provided by the present invention can efficiently remove ammonia nitrogen, and can independently convert NH 4 + converted to gaseous nitrogen product (N 2 O, N 2 ). When treating ammonia-nitrogen-containing wastewater, it can realize the whole process of denitrification under a single strain and a single condition, which is more advantageous than the traditional biological denitrification process of aerobic nitrification-anaerobic denitrification in terms of operation and economic benefits. In addition, the strain has a wide range of C / N ratio, temperature, pH and dissolved oxygen adaptability, and can tolerate and remove high concentrations of ammonia nitrogen.

Description

technical field [0001] The invention belongs to the technical field of environmental microorganism denitrification bacteria. [0002] technical background [0003] With the progress of society and the rapid development of industry and agriculture, human activities such as aquaculture, livestock and poultry breeding, urban life, and agricultural fertilization and irrigation have brought excessive nitrogen and organic matter emissions to the environment, resulting in eutrophication of water bodies and derivatives. A series of environmental problems such as algal blooms and black and odorous water bodies are becoming more and more serious. Effective denitrification treatment of sewage to ensure discharge standards is of great significance for controlling nitrogen discharge and protecting and treating water environment. [0004] Biological nitrogen removal is currently considered to be the most economical and effective way to remove nitrogen from sewage. The traditional biologi...

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Problems solved by technology

This is the most widely used and mature denitrification technology so far. However, it has defects and limitations, mainly including: First, the environmental conditions of nitrification and denitrification bacteria are different, and they need to be carried out in two isolated reactors, or use Intermittent aerobic and anaerobic conditions will cause problems of high cost and cumbersome operation; secondly, nitrifying bacteria are chemoautotrophic bacteria, on the one hand, their growth and reproduction time is longer, which makes the reactor start-up slow, thereby increasing On the other hand, it has a low tolerance threshold for organic loads, is sensitive to environmental impacts, and is difficult to operate; in addition, denitrifying bacteria are heterotrophic bacteria that need organic matter, while nitrifying bacteria cannot tolerate organic matter, so in During sewage treatment, organic matter is usually removed before the nitrification process, and carbon sources are added during the denitrification stage, which makes the process operation unable to be effectively simplified

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